Power mechanism



. ation in which it is lii . other than Patented May 10,

iiNiTnDs'rA'rsjs iijiirrsivi1 fossiles.

FARNUM E. npRsEY, ANGES INC., 0E

This invention relates to for use in connectionl similar machines. adapted for applyin tion oi case-shiftingl or ROCHESTER, noon POWER i!! NEW YORK, AssiG'N'oRro N ESTER, N-Ew vonk, A coRroRA'rIcN or NEW YORK.;

ECHANISIE.

appneaan sied my 31,1925. semi irq. 47,379.

power mechanism with typewriters or .More particularly, it is power to the opera- ,or to any similar operesirable that movement vof a manually operable member or key in cne direction shall result -mevement of thev which' is tofbe actuated return of the keyto norm to its will be described `particulication, to the cas return of said part The invention larly in its app mechanism of such parts as a tabular stop,

carriage, or other par ao typewriter, be evident that it `may alsoi in a corresponding while the release orv al position causes, a normal position.-

e-shift although it will having analogous functions in. machines typewriters.

One object eof the invention is to produce mechanism, fonthe purpose set forth, which shall be simple, reliable and rapid in operation. Another object of the' invention-1s to provide such mechanism in a form such that changeable with nism for operating the typ bo yilg shown on a reduced scale elevation, on a larger scale,

its members maybe to the members of pow a large extent interer mechae-bars of the same machine. Anothemand Vparticular object of the invention is to produce a mechanism in Ywhich the Work incidental to the performance of the case-shift, or analogous function,

is performed, mechanism an Vtrols this' operation,

operated with no more countered in operating the the type-barsare controll nds, sistsni in the power mechanism scribed, as it is dened in To the foregoing e In the accompanyingdrawings, F

so far as p d not by the key which conso that the key ossible, by the power may be resistance than is en-Y keys by which ed.r the invention conliereinafter declaims. ig. 1 is the annexed a partly sectional side-elevation otparts of a tr pew the mechanism shown particularly the rocker thereof. Fig. 3 parts shown in Fig. 2, tion on the line side-elevation of mechanism; and Fig. 5

the tsame.` Fig.l 6 is an riter including power the present invention, w

is a front-elevation o 3-3 in Fig. 2.J Fig. lthe cam-unit of the mechanism emithfthe parts AFig. 2 is avside-l of a portion of in Fig. 1, including and the pull-member takenpartly in sec- 4 is a ower is a rear-elevation of elevation of the cam,y

be applied tov oR'rH EAST Ernishowing the side opposite to. thatishown in Fig.. 4.

The invention is illustrated as embodied in a typewriter of well-known general form, having supports the usual pl riage has at its upper part a carriageJ 10, which aten-roller. the, usual rollers 11 through which pThis carit is supported, in part,.by`a horizontal transt2 verse rail 12. l.

The power mechanism comprises a roller l bottom oit the frame of which is rotated constantly, of the arrow in Fi suitable source, tric motor (not shown). erably covered with Vrubber ing and rictional material.

The roller serves to actuate,

one yof its reentrant portions toward roller. Engagement of the roller may be caused by a slight elockwise upon" its pivot 15.

rotation ot the cam rlhis assembly comprises `a cam to rotate on a pivot 15, which is supding arms 16.. arms are integral with a horizontal 17 constituting a cam-lever provi which turns in a suitable 3 which is journalled transversely near the the machine, and

in the direction g. 1, by power from any such for instance as an elec- '.lhis roller is prei?- esl or other yeldunder the ivotally mountbe called the camded Amachine. The each of which that has a rolling enagement with the power-roller, while the parts of the cam A normal iiis shown vin the the cam at this time presenting the cam with the Such rotation is produced by means of an arm\19, which swings on a p the two arms 16..

two diametrically oppos The cam is provi ite pins 22 project- Y ivot 2() between. ded with ing laterally from its web, and a spring 21,

coiled 'about the hub of the causes the arm these pins is in in Fig. 4. y

' Rotation of q normally prevented' by \a which is spring-arm 19,

to press against whichever of thev lower r position,

as shown stop-lever 23,

also mounted to swingabout the the cam by the spring-arm ivot 20. Near its lower end the stop-lever is provided with a laterally extending stopin Fig. 5, while the detent 26, althoughh `lug 24 which cooperates with two detents 25 and 26 on the cam. The detent 25 extends directly from (heflange of the earn, as shown formed from the metal at. the corresponding opposite part of the cam, 1s offset mwardly, as shown 1n F 1g. 6, so as to be near the axis .of rotation of the cam.

The upper arm 27 of the stop-lever has a laterally bent extremity 28, which is received by the forked extremity 29 of a keylever 30. This key-lever is pivoted `at 31 on the frame of the typewriter, and it is provided, near its forward end, with 4a key 32, occupying the position of the 'ordinary shift-keyof a typewriter. The forward end ofy the key-lever moves in a suitable guide and stop-'member 33, and is normally held in raised position by a spring 34. lIn the normal position of the parts, as shown, the lower arm of the detent-lever is swung rearwardly, and the stop-lug 24 is engaged by the detent 25 'on the cam, the cam being thus held against rotation. In this position of the parts, if the key lower end of the detent-lever is swung forwardly .so as to move the lug 24 out of the path of movement of the stop-lug 25. Thereupon, the' spring-arm 19 turns the cam enough to cause engagement with the powerroller, and sueh'engagement causes rotation ofthecam, with a resulting rocking movement of the cam-lever. After the cam has rotated so that the summit of its upper lobe has engaged the roller, continued rotation' ofthe cam permits thecam-lever to return to its original position, under the influence j of a spring hereafter referred to. Since the Vlar swinging movement of the cam lever.

ronce at each depression,

return movement, of the shift-key.

stop-lever has been swung forwardly, the stop-lug 24 is now in position-i to be engaged by the detent 26 on the cam, and the cam is thus arrested at the end of a half-rotation,

and

remains out. of engagement with the power-roller until the key32 is released aind permitted toy rise. In consequence of this rising movement the detent-lever is swung baekto its original position, thus disengaging the stop-lug 26 and permitting the cam to make another operative engagement with the power-roller, and to cause another simi- From the foregoing description, it will be understood that the cam assembly opera-tes and again at each The eam-lever'is connected, by an adjustable pull-rod 35, with a plate 36, which may be called the hook-plate. This plate lies alongside a pivotally movable .member 37 in the ,form ofa three armed lever, formed The member or .rocker7 a plate 5l which constitutes a part of the stationary framework of the machine. .The

rocker is provided with two pins 39 and 40.

32 be depressed, the".

The hook-member has a large central opening which receives the pivot-stud 38 and the rocker-pins 39 and 4() and it is provided, on opposite sides of this opening, with hooklike shoulders or abutments 42. The space between these abutments is such that when one of them is in engager-nent with one of the pins, the other pin may swing clear of the other abutment. Thus, the hook-member may be caused to engage the two rocker-pins alternatively, according as it is swung' to a forward or rearward position.

The rocker is provided, at its upper end, With a. pin 43, and a pin 44 projects from the plate 51 above the pin'43. A coil-spring 45 is hooked at its ends around these two pins, and the form and relationA of these parts are such .that the. spring resists swinging move- Y,

ment of the rocker in either direction, and acts to keep it in either its forward or rearward position, as thecase may be, until it is moved therefrom by positive' means. Two stop-pins 46 and 47, projecting from`t-l1e plate 51, determine the forward and rearward positions of the rocker. The parts are shown in opposite positions in Figs. 1 and 2.l

tension-spring 48 is attached, at its the stud 38 and limits the upward movement of the hook-member, the parts being adjusted so that, when so arrested, the cam Will have only'the necessary clearance from the power-roller to' prevent engagement therewith. ,1 A link 52 is pivoted, at one end, on the pin 43 carried bythe rocker,.while the. rear end of the link is pivoted on a pin 53 at the upper end of an arm54. This arm is fixed on a rock-shaft- 55 which turns in bearings on the frame of the machine. A. roller surrounding the pin 53 moves in an inclined slot in a lever 56, the frame of the machine.

end of the lever is pivoted to The 'forward a push-rod 58 -attached, at its upper end, to the rail 12.

While the means just described serve to support the rail at onlyone point, it will be understood that the rock-shaft 55 may eX- tend across the machine, and that the parts 54, 56 and 58, may be duplicated at both sides ofthe frame,` so as to maintain the rail in horizontal position.

In Flg. 1 the mechanism is shown in the which is pivoted at 57 on' engaged with the i position occupied by the parts when the carriage l0 is in its vlower position. In this position of the parts the hook-member is rock-pin 39, as shown in Fig. l. If now the key 32 be depressed, the cam is caused to actua'te the cam-lever as hereinbefore described, so as to pull the hook-member downwardl and then to permit the spring 48 to raise it again, This downward movement of the hook-member is transmitted, through the pin 39, to' the rocker, causing the latter to swing to the rearward position shown in. Fig. 2. Through the link 52, the arms 54 are swung rearwardly, to raise the levers 56. the rods 58 and the rail 12, thus moving the carriage to uppercase position. So long as tlie shift-key is held down by the operator the spring 45 holds the parts 36, 52 etc. in the position shown in Fig. 2.

The movement of the rockerfrom for- Ward to rearward position causes the line of pull of the'I spring 48 tobe shifted from a' position in front of the pivot-stud 38 to a position in the .rear o this stud, and this spring acts, accordingly, not only to raise the hook-member, but also to swing it from its forward position, shown in Fig. 1, to its rearward position shown in Fig. 2. In this latter positiontte forward abutment on the hook-member is brought into line with the rocker-pin 40, while the rear abutment is moved rearwardly out of the path of movement of the pin 39. With the parts in this position, if the o erator releases the shiftkey and permits itto rise, thus causing a second actuation of the cam-lever, the resulting downward movement of the hook-member acts, through the pin 40, to swing the rocker back to its forward position, thus restoring the part-s to the position of Fig. 1 and permitting the carriage to "fall againvl to lower-case position. l l

The o eration of the power mechanism is so ra i that the cam normally completes its ha f-rotation while the shift-key is still depressed, and before it can'be released by the operator. very rapid tap,-however, the stop-lever may be permitted to return to vits normal position after releasing the detent 25 and before,

engagement with the detent 26. The operation or' the mechanismwill not be derangedl in this case, however, for the result will be merely a complete rotation of thepam without interruption, causing the carriage to be causing the rollers carried thereby- If the shift-key be given a' -lifted and instantly lowered again, with the parts again coming to rest in the normal position.

The key-lever 30 is shown as articulated with a crank-rod 59, .through which it may be connected withihe usua duplicate shiftkey lever on the opposite side of the machine. The invention claimed is:

1. In a typewriter or the like, the combination, with a .part to be moved and a manually-'operable key, of a rocking member pivotally mounted to rock into two alternative positions; connections, between said member and said part, for moving said part into two alternative positions as said member is moved from one to the other of its said positions; a spring, connected with said member, tending to resist its movement from either position; and power-actuated means,

controlled by said key, constructed andarran'ged to swing the rocking member alternately in opposite directions upon succes.' e operations of the power-actuated means.

2. In a typewriter or the like, the combination, with a part to be moved and a manuv control of said key, to engage and be moved by the power-member; and mechanism, interposed between said driven member and said part to, be moved, constructed and arranged to cause successive similar movements of the driven member to produce suecessive opposite movements of said part.

3. Ina typewriter or the like, the combination, with a art to be-moved and a manually operable ey, of a constantly rotary power-roller; a cam-lever; a cam journalled on said lever and havin successive similar lobes; means, controlle by said k for turning said'cam into engagement wit said roller and for arrestin its rotation after the cooperation of each obe with the roller, whereby successive similar swin ing movements of lthe cam-lever are ro uced said means being operative once w en the .rey is depressed and a ain when the key is raised; and mechanism, interposed between the camlever and said part to be moved, forfproduc- FARNUM F. DoRsEY. 

